Not compiling for ESP32

[ohbhatt]

sqlite3_sdspi.ino
Board ESP32 Dev Module

Here are the error messages:

C:\Users\A\AppData\Local\Temp.arduinoIDE-unsaved2023115-15748-1nxy7ds.xjdqh\sqlite3_sdspi\sqlite3_sdspi.ino: In function 'void setup()':
C:\Users\A\AppData\Local\Temp.arduinoIDE-unsaved2023115-15748-1nxy7ds.xjdqh\sqlite3_sdspi\sqlite3_sdspi.ino:67:10: error: unused variable 'zErrMsg' [-Werror=unused-variable]
char *zErrMsg = 0;
^~~~~~~
cc1plus.exe: some warnings being treated as errors
Multiple libraries were found for "SD.h"
Used: C:\Users\A\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.9\libraries\SD
Not used: C:\Users\A\AppData\Local\Arduino15\libraries\SD
exit status 1
Compilation error: unused variable 'zErrMsg' [-Werror=unused-variable]``

Just loaded the example and it didn't compile - where am I going wrong?

[NixToDo]

If you read the compiler output, you should know the reason why it fails to compile.
Set your compiler warning prereferences to "Normal" or comment out the marked line.